Welding transformer
Output voltage-current characteristic of a welding transformer, reflecting how the secondary voltage varies with load current and load resistance.
Engineering Problem
How can the output voltage-current characteristic of a welding transformer be computed?
Answer
Automatically solve the AC Magnetics model for a series of load resistances and extract the secondary voltage and current for each condition.
Typical Applications
- Welding transformers
- Transformer leakage flux paths
- Transformers with nonlinear cores
Simulation Problem
- Problem Type
- Plane-parallel AC Magnetics + external circuit
- Geometry
- Core, primary winding, secondary winding, external capacitor C and load resistor R.
- Given
- C = 1 μF, R = 0 – 10 Ω
- Primary voltage V = 220 V
- Frequency f = 60 Hz
- Primary winding turns 1200
- Secondary winding turns 220
- Task
- Compute the output U(I) characteristic curve of the welding transformer.
- Solution
The LabelMover parametric tool automatically generates and solves a series of problems for different values of R.
- Results
The flux density distribution and current at R = 0.1 Ω are given.
The welding transformer's output characteristic curve is obtained.
